Gut：房静远院士团队揭示咽峡炎链球菌促进胃癌进展的新机制

Core Viewpoint - Gastric cancer (GC) is the fifth most common cancer globally and a leading cause of cancer-related deaths, with China accounting for nearly 50% of the world's cases despite having only 20% of the global population [3] Group 1: Research Findings - Helicobacter pylori is a major risk factor for gastric cancer, but only 1%-3% of infected individuals develop the disease, indicating other contributing factors [3] - Recent studies by teams from Hong Kong Chinese University and Shanghai Jiao Tong University have identified Streptococcus anginosus as a promoter of gastric cancer through its metabolic product, methionine [3][5] - The research published in the journal Gut demonstrates that S. anginosus enhances gastric cancer progression, providing new insights for potential personalized treatment targets [3][5] Group 2: Methodology and Results - The research utilized shotgun metagenomic sequencing to explore the interaction between S. anginosus and the host, confirming its pro-inflammatory effects [5] - Experiments showed that the abundance of S. anginosus in gastric cancer patients correlates with a significant enrichment of the methionine biosynthesis pathway [5] - The study identified metE gene as crucial for methionine biosynthesis, with higher abundance observed in cancerous tissues, further validated by constructing a mutant strain of S. anginosus lacking the metE gene [5]